Manitowoc Grove GRT8120 User Manual

Grove Published 3-22-2021, Control # 702-02 4-133
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES
4
Determining the Error Type
• Check which emergency program procedure is suitable
for the current error:
If the display (2, Figure 4-128) shows an obviously
unrealistic value, such as -1100 mm or -3.61 ft, then there is
an error on the precision length sensor length indicator of the
CCS. Contact Manitowoc Crane Care or your Local
Distributor to determine if you are permitted to start the
telescoping process. Item 1 is the time remaining to correct
the error.
In the display, items 3 and 4 Figure 4-128 are examples of
indicators for proximity switches. Item 3 is switch S2114N,
and it is shown in a dimmed fashion. This means the switch
has been considered OFF. Item 4 is switch S2118N, and it is
shown in active colors; this switch is considered ON.
These switches are shown in a logical fashion based on their
function. The top row (S2110N, S2111N, and S2112N) is the
switches near the hydraulic actuator. S2111N is physically
located between S2110N and S2112N, so these indicators
are arranged in the same manner.
The next row (S2117N, S2118N, and S2116N) are indicators
for the tele cylinder being aligned with a boom section.
S2117N is shown to the left; when the tele cylinder is nearly
aligned (for instance within 50 mm or 2 inches of the
connection), and S2117N is ON, then the cylinder needs to
extend slightly (moving the right controller to the right, if
using the standard joystick arrangement). If S2116N is ON in
this near connection condition, then the cylinder needs to
retract slightly (moving the controller to the left). These
motions are logical with respect to what is shown on the
screen.
FIGURE 4-128
8854-255a
CAUTION
Machine Damage Hazard!
Make sure that you always have an overview of the
current status of the telescoping mechanism before you
initiate locking or unlocking.
In emergency mode, there maybe no monitoring of
prerequisites – the function is performed immediately
after pressing the button.
CAUTION
Machine Damage Hazard!
Never telescope the main boom if it is not possible to
monitor the length of the tele cylinder by some means.
It would then not be possible for you to monitor
operations, and components in the main boom could be
damaged, or a situation could arise in which the main
boom can no longer be extended or retracted.

Manitowoc Grove GRT8120 Specifications

General

Brand	Manitowoc
Model	Grove GRT8120
Category	Construction Equipment
Language	English